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The chest piece must be made from stainless steel. Steel can be machined to precise tolerances. This allows the diaphragm to fit with an air tight seal. The stethoscope is a "drum" and the smallest air leak will degrade the performance.

The diaphragm must be made from high quality flexible material. The diaphragm is often the primary problem with "cheap" stethoscopes.

The tube should be made from thick material preferably with a large internal double bore. This improves sound transmission and isolates external noise.

The ear pieces. must be angled and soft. The ear tip must fit smugly into the ear canal.

Cleaning•The entire stethoscope can be wiped clean with alcohol or soapy water.•NOTE: Do not immerse your stethoscope in any liquid or subject it to steam sterilization.•If disinfection is required, the stethoscope may be wiped with a 70% isopropyl alcohol solution.

Usage Tips• Point the ear tips in a forward, not backward, direction as you place them in the ear canal.• Use light pressure (not excessive) when pressing the diaphragm on the patient.• Fully engage in either the diaphragm or bell position (dual head scopes).• Verify that the air passageway through the ear tips is not clogged. Care Tips• Keep it Clean, hospitals and clinics are contaminated. So disinfect your stethoscope regularly